##!/usr/bin/env python3
# -*- coding: utf-8 -*-

import time, functools


def metric(fn):
    @functools.wraps(fn)
    def func(*args, **kw):
        star = time.perf_counter()
        fn(*args, **kw)
        end = time.perf_counter()
        print('%s executed in %s ms' % (fn.__name__, end - star))
        return fn(*args, **kw)

    return func


# 测试
@metric
def fast(x, y):
    time.sleep(0.0012)
    return x + y;


@metric
def slow(x, y, z):
    time.sleep(0.1234)
    return x * y * z;


f = fast(11, 22)
s = slow(11, 22, 33)
if f != 33:
    print('测试失败!')
elif s != 7986:
    print('测试失败!')
